diff --git a/core/includes/schema.inc b/core/includes/schema.inc
index b367bb571e..753cc935dc 100644
--- a/core/includes/schema.inc
+++ b/core/includes/schema.inc
@@ -78,26 +78,16 @@ function drupal_get_schema_versions($module) {
  *   The currently installed schema version, or
  *   \Drupal\Core\Extension\SchemaInstallerInterface::UNINSTALLED if the module
  *   is not installed.
+ *
+ * @deprecated in Drupal 8.7.0 and will be removed before Drupal 9.0.0. Use
+ *   \Drupal\Core\Extension\SchemaInstallerInterface::getInstalledVersion()
+ *   instead.
+ *
+ * @see https://www.drupal.org/node/2444417
  */
 function drupal_get_installed_schema_version($module, $reset = FALSE, $array = FALSE) {
-  $versions = &drupal_static(__FUNCTION__, []);
-
-  if ($reset) {
-    $versions = [];
-  }
-
-  if (!$versions) {
-    if (!$versions = \Drupal::keyValue('system.schema')->getAll()) {
-      $versions = [];
-    }
-  }
-
-  if ($array) {
-    return $versions;
-  }
-  else {
-    return isset($versions[$module]) ? $versions[$module] : SchemaInstallerInterface::UNINSTALLED;
-  }
+  @trigger_error('drupal_get_installed_schema_version() is deprecated in Drupal 8.7.0 and will be removed before Drupal 9.0.0. Use \Drupal\Core\Extension\SchemaInstallerInterface::getInstalledVersion() instead. See https://www.drupal.org/node/2444417', E_USER_DEPRECATED);
+  return \Drupal::service('schema_installer')->getInstalledVersion($module, $reset, $array);
 }
 
 /**
@@ -107,11 +97,16 @@ function drupal_get_installed_schema_version($module, $reset = FALSE, $array = F
  *   A module name.
  * @param string $version
  *   The new schema version.
+ *
+ * @deprecated in Drupal 8.7.0 and will be removed before Drupal 9.0.0. Use
+ *   \Drupal\Core\Extension\SchemaInstallerInterface::setInstalledVersion()
+ *   instead.
+ *
+ * @see https://www.drupal.org/node/2444417
  */
 function drupal_set_installed_schema_version($module, $version) {
-  \Drupal::keyValue('system.schema')->set($module, $version);
-  // Reset the static cache of module schema versions.
-  drupal_get_installed_schema_version(NULL, TRUE);
+  @trigger_error('drupal_set_installed_schema_version() is deprecated in Drupal 8.7.0 and will be removed before Drupal 9.0.0. Use \Drupal\Core\Extension\SchemaInstallerInterface::setInstalledVersion() instead. See https://www.drupal.org/node/2444417', E_USER_DEPRECATED);
+  \Drupal::service('schema_installer')->setInstalledVersion($module, $version);
 }
 
 /**
@@ -119,14 +114,15 @@ function drupal_set_installed_schema_version($module, $version) {
  *
  * @param string $module
  *   The module for which the tables will be created.
+ *
+ * @deprecated in Drupal 8.7.0 and will be removed before Drupal 9.0.0. Use
+ *   \Drupal\Core\Extension\SchemaInstallerInterface::install() instead.
+ *
+ * @see https://www.drupal.org/node/2444417
  */
 function drupal_install_schema($module) {
-  $schema = drupal_get_module_schema($module);
-  _drupal_schema_initialize($schema, $module, FALSE);
-
-  foreach ($schema as $name => $table) {
-    \Drupal::database()->schema()->createTable($name, $table);
-  }
+  @trigger_error('drupal_install_schema() is deprecated in Drupal 8.7.0 and will be removed before Drupal 9.0.0. Use \Drupal\Core\Extension\SchemaInstallerInterface::install() instead. See https://www.drupal.org/node/2444417', E_USER_DEPRECATED);
+  \Drupal::service('schema_installer')->install($module);
 }
 
 /**
@@ -134,16 +130,15 @@ function drupal_install_schema($module) {
  *
  * @param string $module
  *   The module for which the tables will be removed.
+ *
+ * @deprecated in Drupal 8.7.0 and will be removed before Drupal 9.0.0. Use
+ *   \Drupal\Core\Extension\SchemaInstallerInterface::uninstall() instead.
+ *
+ * @see https://www.drupal.org/node/2444417
  */
 function drupal_uninstall_schema($module) {
-  $tables = drupal_get_module_schema($module);
-  _drupal_schema_initialize($tables, $module, FALSE);
-  $schema = \Drupal::database()->schema();
-  foreach ($tables as $table) {
-    if ($schema->tableExists($table['name'])) {
-      $schema->dropTable($table['name']);
-    }
-  }
+  @trigger_error('drupal_uninstall_schema() is deprecated in Drupal 8.7.0 and will be removed before Drupal 9.0.0. Use \Drupal\Core\Extension\SchemaInstallerInterface::uninstall() instead. See https://www.drupal.org/node/2444417', E_USER_DEPRECATED);
+  \Drupal::service('schema_installer')->uninstall($module);
 }
 
 /**
@@ -188,8 +183,14 @@ function drupal_get_module_schema($module, $table = NULL) {
  *   (optional) Whether to additionally remove 'description' keys of all tables
  *   and fields to improve performance of serialize() and unserialize().
  *   Defaults to TRUE.
+ *
+ * @deprecated in Drupal 8.7.0 and will be removed before Drupal 9.0.0. No
+ *   direct replacement provided.
+ *
+ * @see https://www.drupal.org/node/2444417
  */
 function _drupal_schema_initialize(&$schema, $module, $remove_descriptions = TRUE) {
+  @trigger_error('_drupal_schema_initialize() is deprecated in Drupal 8.7.0 and will be removed before Drupal 9.0.0. No direct replacement provided. See https://www.drupal.org/node/2444417', E_USER_DEPRECATED);
   // Set the name and module key for all tables.
   foreach ($schema as $name => &$table) {
     if (empty($table['module'])) {
diff --git a/core/includes/update.inc b/core/includes/update.inc
index 12bbd0b670..e021e64b04 100644
--- a/core/includes/update.inc
+++ b/core/includes/update.inc
@@ -117,12 +117,11 @@ function update_check_requirements() {
  *   The schema version the module should be set to.
  */
 function update_set_schema($module, $schema_version) {
-  \Drupal::keyValue('system.schema')->set($module, $schema_version);
+  \Drupal::service('schema_installer')->setInstalledVersion($module, $schema_version);
   \Drupal::service('extension.list.profile')->reset();
   \Drupal::service('extension.list.module')->reset();
   \Drupal::service('extension.list.theme_engine')->reset();
   \Drupal::service('extension.list.theme')->reset();
-  drupal_static_reset('drupal_get_installed_schema_version');
 }
 
 /**
diff --git a/core/lib/Drupal/Core/Database/database.api.php b/core/lib/Drupal/Core/Database/database.api.php
index c39cf78cf4..afe64a8f89 100644
--- a/core/lib/Drupal/Core/Database/database.api.php
+++ b/core/lib/Drupal/Core/Database/database.api.php
@@ -385,7 +385,7 @@
  * ];
  * @endcode
  *
- * @see drupal_install_schema()
+ * @see \Drupal\Core\Extension\SchemaInstallerInterface::install()
  *
  * @}
  */
diff --git a/core/lib/Drupal/Core/Extension/SchemaInstaller.php b/core/lib/Drupal/Core/Extension/SchemaInstaller.php
index 4fdaf92b23..1b23e101fb 100644
--- a/core/lib/Drupal/Core/Extension/SchemaInstaller.php
+++ b/core/lib/Drupal/Core/Extension/SchemaInstaller.php
@@ -112,9 +112,7 @@ public function getInstalledVersion($module, $reset = FALSE, $array = FALSE) {
     if ($array) {
       return $this->currentVersions;
     }
-    else {
-      return isset($this->currentVersions[$module]) ? $this->currentVersions[$module] : static::UNINSTALLED;
-    }
+    return isset($this->currentVersions[$module]) ? $this->currentVersions[$module] : static::UNINSTALLED;
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Update/UpdatePathTestBase.php b/core/modules/system/src/Tests/Update/UpdatePathTestBase.php
index 49d96ac4b9..5acdab0754 100644
--- a/core/modules/system/src/Tests/Update/UpdatePathTestBase.php
+++ b/core/modules/system/src/Tests/Update/UpdatePathTestBase.php
@@ -281,9 +281,9 @@ protected function runUpdates() {
           }
         }
       }
-      // Reset the static cache of drupal_get_installed_schema_version() so that
+      // Reset the static cache of installed schema versions so that
       // more complex update path testing works.
-      drupal_static_reset('drupal_get_installed_schema_version');
+      \Drupal::service('schema_installer')->getInstalledVersion(NULL, TRUE);
 
       // The config schema can be incorrect while the update functions are being
       // executed. But once the update has been completed, it needs to be valid
diff --git a/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php b/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php
index 4627218845..39b361e9ba 100644
--- a/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php
+++ b/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php
@@ -220,7 +220,7 @@ public function testUninstallProfileDependency() {
     $result = $this->moduleInstaller()->uninstall([$non_dependency]);
     $this->assertTrue($result, 'ModuleInstaller::uninstall() returns TRUE.');
     $this->assertFalse($this->moduleHandler()->moduleExists($non_dependency));
-    $this->assertEquals(drupal_get_installed_schema_version($non_dependency), SchemaInstallerInterface::UNINSTALLED, "$non_dependency module was uninstalled.");
+    $this->assertEquals(\Drupal::service('schema_installer')->getInstalledVersion($non_dependency), SchemaInstallerInterface::UNINSTALLED, "$non_dependency module was uninstalled.");
 
     // Verify that the installation profile itself was not uninstalled.
     $uninstalled_modules = \Drupal::state()->get('module_test.uninstall_order') ?: [];